diff options
Diffstat (limited to 'wirish')
| -rw-r--r-- | wirish/native_sram.cpp | 45 | ||||
| -rw-r--r-- | wirish/native_sram.h | 43 | ||||
| -rw-r--r-- | wirish/rules.mk | 1 | ||||
| -rw-r--r-- | wirish/wirish.cpp | 3 |
4 files changed, 91 insertions, 1 deletions
diff --git a/wirish/native_sram.cpp b/wirish/native_sram.cpp new file mode 100644 index 0000000..5e8095f --- /dev/null +++ b/wirish/native_sram.cpp @@ -0,0 +1,45 @@ +/****************************************************************************** + * The MIT License + * + * Copyright (c) 2011 LeafLabs, LLC. + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + *****************************************************************************/ + +#include "native_sram.h" +#include "libmaple.h" +#include "fsmc.h" +#include "rcc.h" + +#ifdef BOARD_maple_native + +void initNativeSRAM(void) { + fsmc_nor_psram_reg_map *regs = FSMC_NOR_PSRAM1_BASE; + + fsmc_sram_init_gpios(); + rcc_clk_enable(RCC_FSMC); + + regs->BCR = FSMC_BCR_WREN | FSMC_BCR_MWID_16BITS | FSMC_BCR_MBKEN; + fsmc_nor_psram_set_addset(regs, 0); + fsmc_nor_psram_set_datast(regs, 3); +} + +#endif diff --git a/wirish/native_sram.h b/wirish/native_sram.h new file mode 100644 index 0000000..7724667 --- /dev/null +++ b/wirish/native_sram.h @@ -0,0 +1,43 @@ +/****************************************************************************** + * The MIT License + * + * Copyright (c) 2011 LeafLabs, LLC. + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + *****************************************************************************/ + +#ifdef BOARD_maple_native + +#ifndef _NATIVE_SRAM_H_ +#define _NATIVE_SRAM_H_ + +/** + * Sets up the FSMC peripheral to use the SRAM chip on the Maple + * Native as an external segment of system memory space. + * + * This implementation is for the IS62WV51216BLL 8Mb chip (55ns + * timing, 512K x 16 bits). + */ +void initNativeSRAM(void); + +#endif + +#endif diff --git a/wirish/rules.mk b/wirish/rules.mk index cea34f5..3dd4b2d 100644 --- a/wirish/rules.mk +++ b/wirish/rules.mk @@ -27,6 +27,7 @@ cppSRCS_$(d) := wirish_math.cpp \ pwm.cpp \ ext_interrupts.cpp \ wirish_digital.cpp \ + native_sram.cpp \ boards.cpp cFILES_$(d) := $(cSRCS_$(d):%=$(d)/%) diff --git a/wirish/wirish.cpp b/wirish/wirish.cpp index 6d77bc8..c5a9e30 100644 --- a/wirish/wirish.cpp +++ b/wirish/wirish.cpp @@ -41,6 +41,7 @@ #include "fsmc.h" #include "dac.h" #include "flash.h" +#include "native_sram.h" void init(void) { /* make sure the flash is ready before spinning the high speed clock up */ @@ -48,7 +49,7 @@ void init(void) { flash_set_latency(FLASH_WAIT_STATE_2); #ifdef BOARD_maple_native - fsmc_native_sram_init(); + initNativeSRAM(); #endif /* initialize clocks */ |